[{"content":"content1","fromUser":"user1","toUser":"user2","messageRead":true,"createdAt":"2022-02-26T16:37:48.244Z"},{"content":"content2","fromUser":"user2","toUser":"user1","messageRead":true,"createdAt":"2022-02-26T17:37:48.244Z"},{"content":"content3","fromUser":"user1","toUser":"user2","messageRead":false,"createdAt":"2022-02-26T18:37:48.244Z"},{"content":"content4","fromUser":"user1","toUser":"user3","messageRead":false,"createdAt":"2022-02-26T19:37:48.244Z"},{"content":"content4","fromUser":"user2","toUser":"user3","messageRead":false,"createdAt":"2022-02-26T20:37:48.244Z"},{"content":"content4","fromUser":"user3","toUser":"user1","messageRead":false,"createdAt":"2022-02-26T20:37:48.244Z"},]

db.collection.aggregate([{$match:{$and:[{fromUser:{$in:["user1","user2"]}},{toUser:{$in:["user1","user2"]}}]}}])